7. Petworth House. Located in Sussex and featuring grounds designed by Capability Brown, Petworth is most noted for having one of the finest art collections in all of England. It was one of the first stately homes I insisted on visiting because of its association with Georgian playboy, Lord Egremont, who was said to have sired 63 illegitimate children.
8. Plas Newydd. Alas, this is one I've not visited, owing to its location in Wales. (I'm particularly interested in stately homes that can be accessed with the aid of my BritRail passes since I don't drive in the UK.) This has been the family seat of the Marquess of Angelsey and has beautiful views over the Menai Straits to Snowdonia.